William f



(N0 Modelj) I Y Y W. 1-. MURRAY. OAPSTAN.

No. 498,076. Patented May 23,1893.

llnrrn "inns WVILLIAM F. MURRAY, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOROF ONE-HALF TO SAMUEL MURRAY, OF SAME PLACE.

CAPSTAN.

SPECIFICATION formingpart of Letters Patent No. 498,075, dated May 23,1893.

Application filed October 26, 1892. Serial No. 450,077. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM F. MURRAY, a citizen of the United States,residing in the city and county of San Francisco, State of California,have invented an Improvement in Capstans; and I hereby declare thefollowing to be a full, clear, and exact description of the same.

My invention relates to a capstan or apparatus for winding ropes for thepurpose of hauling logs or other articles, or for doing work uponvessels.

It consists of a winding drum in connection with gearing whereby thespeed and power of the drum may be changed to suit the character of workbeing done.

Referring to the accompanying drawings for a more complete explanationof myinvention,-Figure 1 is a vertical cross-section through my device.Fig. 2 is a horizontal pvross section of the same on the line y-y of Theobject of my invention is to provide a winding gipsy or capstan withasimple mechanism by which the power may be greatly multiplied, or bywhich less power may be obtained and a greater rate of speed.

As illustrated in the present case, A is a base having journaled upon itthe driving pinion B, and C is a vertical shaft having keyed to it acorrespondingbevel-gearD with which the pinion B meshes, and by whichthe vertical shaft is driven. Surrounding this vertical shaft, and abovethe base, is a fixed circular table E, the upper surface of which has asunken chamber within which is fitted to turn loosely a circular disk oridler F,

disk F.

J is a cap having asuuken chamber formed in the interior of its lowersurface, with teeth which are adapted to engage with those of thepinions I when the cap is in place and resting upon the disk F. From theupper surface of this cap projects the polygonal shank K and the windingdrum L is adapted to fit over this and be locked thereto by reason ofthe polygonal shape of the shank and the interior of the drum so thatthe drum can be removed and replaced at any time without disturbing theremainder of the apparatus.

The upper end of the vertical shaft C has a clutch M fitted to slide upand down upon a feather fixed to the shaft. This clutch engagescorresponding lugs in the upper end of the extension above the shank Kwhich carries the winding drum. A yoke N has arms atits lower end whichengage a groove or channel in the top of the clutch M and a screw 0passing through the yoke and having a step in the upper end of thevertical shaft, serves to raise the clutch out of engagement with theshank, or by turning in the opposite direction to allow it to be lowereduntil it engages the latter. Any other equivalent device may be employedto raise and depress the clutch.

The operation will then be asfoll0ws: When the clutch M is brought intoengage- "ment with. the shank of the part K, the disk F being free toturn, power is applied to the driving shaft, and through the bevel-gearand pinion the vertical shaft is caused to rotate. By reason of theclutch which connects it directly with the polygonal shank carrying thewinding drum, the latter is caused to rotate at the same rate of speedwith the vertical shaft with which it is directly united. The pinions Iturning freely upon their studs simply travel around with the disk Fwithin the case J, rolling in contact with its interior gear teeth, andacting as idlers. If, however, it is desired to increase the power ofthe apparatus, the clutch M is disengaged from the shank of K, and byintroducing the key into the key-way G on the periphery of the circulartable E, so as to engage with one of the corresponding notches in theperiphery of the disk F, the disk will be locked so that it cannot turnupon the table. By this means the three pinions I will he madetemporarily stationary, but can rotate upon their studs. Now, when poweris applied to rotate the vertical shaft the latter, through its pinionII, imparts a rotary motion to the pinions I and these in turncommunicate motion to the case J with the teeth on the interior of whichthey mesh, and the winding drum is thus rotated at a slower rate ofspeed with a corresponding increase of power. The amount of power andthe rate of speed of rotation will depend upon the proportion of thegears and pinions, and these may be varied to suit circumstances.

lVhen used for logging purposes the apparatus may preferably be mountedupon a sled so as to be easily hauled from place to place.

Any suitable power may be used in connection with the apparatus, but Iprefer to use an engine of suitable construction.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- 1. In a capstan or winding apparatus, achambered cap having teeth around its interior, a winding drum mountedupon said cap, a stationary table, a disk turning thereupon, averticaldriving shaft turning freely through the centerof the table anddisk,apinionI*I fixed to the driving shaft above the face of said disk,pinions I turning upon studs which project upon the face of the disk,said pinions engaging the pinion II and the interior teeth of the drumcarrying cap, notches formed around the periphery of the disk and acorresponding notch in the table upon which the disk turns, and a key bywhich the disk may be locked to the table whereby power is transmittedfrom the vertical shaft through the intermediate gears to the Windingdrum, substantially as herein described.

2. In a winding apparatus, the drum an internally geared cap to whichsaid drum is fixed the vertical driving shaft passing through andturning freely in said cap, a supporting table having the uppersurfacechambered, a disk F turning freely in the chamber of said tableand having notches in its periphery and a key whereby itmaybe locked tothe table or disengaged theref1'om,a pinion I-I fixed upon the shaftabove the surface of the disk, pinions I turning freely upon studs whichproject from the surface of the disk, said pinions engaging the pinion Hand the interior teeth of the cap, a clutch M sliding upon a featherupon the upper end of the driving shaft, and a device whereby it may becaused to engage with and lock the winding drum, so that motion istransmitted from the shaft directly to the drum when the disk F isunlocked from the table, and whereby a slower motion is communicated tothe winding drum through the gears II and I when the disk is locked tothe table and the clutch disengaged from the drum, substantially asherein described.

In witness whereof I have hereunto set my hand.

WILLIAM F. MURRAY.

Witnesses:

S. H. NOURSE, J. A. BAYLESS.

